Mechanism for converting motion



(No Model.)

W. HANNA.

MECHANISM FOR CONVERTING MOTION.

No. 246,128. I Patented Aug. 23,1881.

WITNESSES: INVENTOR: 1240 ffi/fl z I lflymww ./@Zm 17 BY ATTORNEYS.

"rre TATES PATENT OFFICE.

WILLIAM HANNA, OF GILROY, CALIFORNIA.

MECHANISM FOR CONVERTING MOTION.

SPECIFICATION forming part of Letters Patent No. 246,128, dated August 23, 1881, Application filed February 11, 1881. (N 0 model.)

To all whom it may concern:

Be it known that 1, WILLIAM HANNA, of Gilroy, in the county of Santa Clara and State of California, have invented a new and useful Improvement in Mechanism for Converting Motion, of which the following is a full, clear, and exact description.

My improved mechanism is intended for use as a substitute for cranks in converting rectilinear reciprocating to continuous rotary motion, the special object being to increase the extent of rotary motion from a given length of stroke, while at the same time avoiding deadcenters. I make use of a double rack and double set of pinionsand clutches geared to a common shaft; and myinvention consists in novel pawl devices and a novel arrangement of the parts, whereby the desired motion is obtained without undue strain or wear on the parts, as hereinafter described and claimed.

In the drawings, Figure l is a plan view of mechanism embodying my invention. Fig. 2 is a vertical longitudinal section of the same.

Similar letters of reference indicate corresponding parts.

A is a bed-plate, of any suitable character, on which the shaft (0 that is to be driven is carried, and on shaft a is a fiy-wheel, Z). In case the primary motion is rotary, shaft a represents the driving-shaft. On the shaft a are two fast pinions, o c, gearing respectively with gear-wheels d d, that are fast on horizontal shafts e 0, supported in suitable bearing on bed-plate A. The pinions c c are alike in size, and are proportioned to the wheels (I d, to give shaft a two or more revolutions at each revolution of shafts c c. On the shafts e e are loose pinions ff, each of which carries a radial arm, g, and upon each wheel d or d is a spring-pawl, ii, that is engaged by the arm 9 oftheloosepinionforj". The loosepinionsfj" are between the gear-wheels d at, one above the other, and the pawls h are on the contiguous faces of the gear-wheels. The pinionsff are in the same plane of revolution; but their shafts e c are out of line vertically, so that the pinions may be brought closer together for operation by the same rack, as next described.

B is a rack-bar extending between the pinions ff, and fitted to move horizontally in a suitable slideway provided on bed plate A. The bar has cogs formed both on its upper and lower side, and such cogs are between side flanges, by which the bar bears on its supports.

6 is a pitman connected with the outer end of the rack, for reciprocating the same by connections with suitable power.

In operation the reciprocation of the rack B gives revolution to the loose pinionsff in opposite directions, and the arm 9 of one pinion moves one gear-wheel, d or d, by contact with the end of one pawl h, the arm 9 of the other pinion passing beneath the other pawl h and moving it outward without further effeet. The shaft a is thus revolved at each reciprocation of the rack. Preferably the rack will give one revolution to piniousff ateach movement, with the result of two revolutions to shaft to, and consequently this shaft working back through the pinion c or 0 will reverse the wheel (1 or d, so that when the rack starts back the arm g and pawl h will bein position to act immediately.

This construction is compact, and the movements are obtained without uneven strain or wear. its center line at each reciprocation.

Having thus described myinvention,I claim as new and desire to secure by Letters Patentl. The mechanism for converting motion, consisting of the fast gear-Wheels d d, shafts c c, loose pinions ff, shaft to, fast pinions 0 c, spring-pawls lb, fixed arms g, and reciprocating double rack B, combined for operation substantially. as shown and described.

2. In mechanism for converting motion, the gearwheels cl d, fitted with spring-pawls h and geared to a common shaft, the pini'onsff, carrying arms g and loose on the shafts of the wheels 61, and the double rack B, fitted for reciprocation between the loose pinions, substan- The rack a 1 lies the )OWBI near] on l P l y t-ially as shown and described, combined for operation as specified.

WlLLIAM HANNA. Witnesses:

ADAM RIEHL, GEO. E. BENNETT. 

